void
gfxRect::RoundOut()
{
gfxFloat x0 = NS_floor(X());
gfxFloat y0 = NS_floor(Y());
gfxFloat x1 = NS_ceil(XMost());
gfxFloat y1 = NS_ceil(YMost());
pos.x = x0;
pos.y = y0;
size.width = x1 - x0;
size.height = y1 - y0;
}
already_AddRefed<gfxContext>
gfxCachedTempSurface::Get(gfxASurface::gfxContentType aContentType,
const gfxRect& aRect,
gfxASurface* aSimilarTo)
{
if (mSurface) {
/* Verify the current buffer is valid for this purpose */
if (mSize.width < aRect.width || mSize.height < aRect.height
|| mSurface->GetContentType() != aContentType) {
mSurface = nsnull;
} else {
NS_ASSERTION(mType == aSimilarTo->GetType(),
"Unexpected surface type change");
}
}
PRBool cleared = PR_FALSE;
if (!mSurface) {
mSize = gfxIntSize(PRInt32(NS_ceil(aRect.width)), PRInt32(NS_ceil(aRect.height)));
mSurface = aSimilarTo->CreateSimilarSurface(aContentType, mSize);
if (!mSurface)
return nsnull;
cleared = PR_TRUE;
#ifdef DEBUG
mType = aSimilarTo->GetType();
#endif
}
mSurface->SetDeviceOffset(-aRect.TopLeft());
nsRefPtr<gfxContext> ctx = new gfxContext(mSurface);
ctx->Rectangle(aRect);
ctx->Clip();
if (!cleared && aContentType != gfxASurface::CONTENT_COLOR) {
ctx->SetOperator(gfxContext::OPERATOR_CLEAR);
ctx->Paint();
ctx->SetOperator(gfxContext::OPERATOR_OVER);
}
CachedSurfaceExpirationTracker::MarkSurfaceUsed(this);
return ctx.forget();
}
HDC
gfxWindowsNativeDrawing::BeginNativeDrawing()
{
if (mRenderState == RENDER_STATE_INIT) {
nsRefPtr<gfxASurface> surf = mContext->CurrentSurface(&mDeviceOffset.x, &mDeviceOffset.y);
if (!surf || surf->CairoStatus())
return nsnull;
gfxMatrix m = mContext->CurrentMatrix();
if (!m.HasNonTranslation())
mTransformType = TRANSLATION_ONLY;
else if (m.HasNonAxisAlignedTransform())
mTransformType = COMPLEX;
else
mTransformType = AXIS_ALIGNED_SCALE;
// if this is a native win32 surface, we don't have to
// redirect rendering to our own HDC; in some cases,
// we may be able to use the HDC from the surface directly.
if ((surf->GetType() == gfxASurface::SurfaceTypeWin32 ||
surf->GetType() == gfxASurface::SurfaceTypeWin32Printing) &&
(surf->GetContentType() == gfxASurface::CONTENT_COLOR ||
(surf->GetContentType() == gfxASurface::CONTENT_COLOR_ALPHA &&
(mNativeDrawFlags & CAN_DRAW_TO_COLOR_ALPHA))))
{
// grab the DC. This can fail if there is a complex clipping path,
// in which case we'll have to fall back.
mWinSurface = static_cast<gfxWindowsSurface*>(static_cast<gfxASurface*>(surf.get()));
mDC = mWinSurface->GetDCWithClip(mContext);
if (mDC) {
if (mTransformType == TRANSLATION_ONLY) {
mRenderState = RENDER_STATE_NATIVE_DRAWING;
mTranslation = m.GetTranslation();
} else if (((mTransformType == AXIS_ALIGNED_SCALE)
&& (mNativeDrawFlags & CAN_AXIS_ALIGNED_SCALE)) ||
(mNativeDrawFlags & CAN_COMPLEX_TRANSFORM))
{
mWorldTransform.eM11 = (FLOAT) m.xx;
mWorldTransform.eM12 = (FLOAT) m.yx;
mWorldTransform.eM21 = (FLOAT) m.xy;
mWorldTransform.eM22 = (FLOAT) m.yy;
mWorldTransform.eDx = (FLOAT) m.x0;
mWorldTransform.eDy = (FLOAT) m.y0;
mRenderState = RENDER_STATE_NATIVE_DRAWING;
}
}
}
// If we couldn't do native drawing, then we have to do two-buffer drawing
// and do alpha recovery
if (mRenderState == RENDER_STATE_INIT) {
mRenderState = RENDER_STATE_ALPHA_RECOVERY_BLACK;
// We round out our native rect here, that way the snapping will
// happen correctly.
mNativeRect.RoundOut();
// we only do the scale bit if we can do an axis aligned
// scale; otherwise we scale (if necessary) after
// rendering with cairo. Note that if we're doing alpha recovery,
// we cannot do a full complex transform with win32 (I mean, we could, but
// it would require more code that's not here.)
if (mTransformType == TRANSLATION_ONLY || !(mNativeDrawFlags & CAN_AXIS_ALIGNED_SCALE)) {
mScale = gfxSize(1.0, 1.0);
// Add 1 to the surface size; it's guaranteed to not be incorrect,
// and it fixes bug 382458
// There's probably a better fix, but I haven't figured out
// the root cause of the problem.
mTempSurfaceSize =
gfxIntSize((PRInt32) NS_ceil(mNativeRect.Width() + 1),
(PRInt32) NS_ceil(mNativeRect.Height() + 1));
} else {
// figure out the scale factors
mScale = m.ScaleFactors(PR_TRUE);
mWorldTransform.eM11 = (FLOAT) mScale.width;
mWorldTransform.eM12 = 0.0f;
mWorldTransform.eM21 = 0.0f;
mWorldTransform.eM22 = (FLOAT) mScale.height;
mWorldTransform.eDx = 0.0f;
mWorldTransform.eDy = 0.0f;
// See comment above about "+1"
mTempSurfaceSize =
gfxIntSize((PRInt32) NS_ceil(mNativeRect.Width() * mScale.width + 1),
(PRInt32) NS_ceil(mNativeRect.Height() * mScale.height + 1));
}
}
}
if (mRenderState == RENDER_STATE_NATIVE_DRAWING) {
// we can just do native drawing directly to the context's surface
// do we need to use SetWorldTransform?
if (mTransformType != TRANSLATION_ONLY) {
SetGraphicsMode(mDC, GM_ADVANCED);
GetWorldTransform(mDC, &mOldWorldTransform);
SetWorldTransform(mDC, &mWorldTransform);
}
GetViewportOrgEx(mDC, &mOrigViewportOrigin);
SetViewportOrgEx(mDC,
mOrigViewportOrigin.x + (int)mDeviceOffset.x,
mOrigViewportOrigin.y + (int)mDeviceOffset.y,
NULL);
return mDC;
} else if (mRenderState == RENDER_STATE_ALPHA_RECOVERY_BLACK ||
mRenderState == RENDER_STATE_ALPHA_RECOVERY_WHITE)
{
// we're going to use mWinSurface to create our temporary surface here
// get us a RGB24 DIB; DIB is important, because
// we can later call GetImageSurface on it.
mWinSurface = new gfxWindowsSurface(mTempSurfaceSize);
mDC = mWinSurface->GetDC();
RECT r = { 0, 0, mTempSurfaceSize.width, mTempSurfaceSize.height };
if (mRenderState == RENDER_STATE_ALPHA_RECOVERY_BLACK)
FillRect(mDC, &r, (HBRUSH)GetStockObject(BLACK_BRUSH));
else
FillRect(mDC, &r, (HBRUSH)GetStockObject(WHITE_BRUSH));
if ((mTransformType != TRANSLATION_ONLY) &&
(mNativeDrawFlags & CAN_AXIS_ALIGNED_SCALE))
{
SetGraphicsMode(mDC, GM_ADVANCED);
SetWorldTransform(mDC, &mWorldTransform);
}
return mDC;
} else {
NS_ERROR("Bogus render state!");
return nsnull;
}
}